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Method and apparatus for estimating channel using phase compensation in wireless communication system

phase compensation technology, applied in the field of method and an apparatus for estimating a channel using phase compensation in a wireless communication system, can solve the problems of high complexity, difficult system use of phase compensation scheme, real time, etc., and achieve the effect of reducing the complexity of the wireless communication system

Active Publication Date: 2014-03-25
SAMSUNG ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach simplifies channel estimation complexity, achieves performance close to ideal Wiener filtering, and minimizes performance degradation by compensating for phase shifts and varying channel conditions, thereby enhancing channel estimation accuracy and efficiency.

Problems solved by technology

However, since it should continuously calculate the correlation matrix for the changing channel in order to obtain the weight as described above and calculate the inverse matrix every time, the complexity is very high.
Therefore, it is difficult to use this scheme for a system in which the channel should be estimated in real time.
Further, even the Wiener Filtering in the time axis is degraded due to the complexity in calculation of the inverse matrix and due to discrepancies between the correlation matrixes of the actual and representative channels.

Method used

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  • Method and apparatus for estimating channel using phase compensation in wireless communication system
  • Method and apparatus for estimating channel using phase compensation in wireless communication system
  • Method and apparatus for estimating channel using phase compensation in wireless communication system

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Embodiment Construction

[0025]Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted to avoid obscuring the subject matter of the present invention. Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0026]The described embodiments of the present invention are provided to solve the complexity of Wiener filtering in the conventional channel estimating method and to solve degradation in performance caused by the interpolation and averaging scheme in the channel estimation. For this purpose, the embodiments of the present invention provide a method of estimating a channel, in which a main phase compensation is first performed for compensating for the shifted phases of each frequency when the channels are estimated, and then a simple moving average is performed in a fr...

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Abstract

Method of estimating a channel in a wireless communication system by obtaining a channel impulse response from a pilot signal included in a received signal; estimating a timing offset with a maximum peak power value for the channel impulse response; and performing a phase compensation using the estimated timing offset and estimating a channel which is applied with the compensated phase.

Description

PRIORITY[0001]This application claims priority under 35 U.S.C. §119(a) to an application entitled “Method and Apparatus for Estimating Channel Using Phase Compensation in Wireless Communication System” filed in the Korean Intellectual Property Office on Dec. 24, 2009, and assigned Serial No. 10-2009-0131301, the entire disclosure of which is incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates generally to a method and an apparatus for estimating a channel in a wireless communication system, and in particular, to a method and an apparatus for estimating a channel using phase compensation in a wireless communication system.[0004]2. Description of the Related Art[0005]Recently, various studies and research have been actively performed for the Orthogonal Frequency-Division Multiplexing (OFDM) scheme which is a used in a mobile communication system to transmit data at high speed through a wire / wireless channel. Th...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H03D1/00H04L27/06
CPCH04L25/0228H04L25/0212H04L27/22
Inventor PARK, HYO-YOLJO, SUNG-KWONYANG, HA-YOUNG
Owner SAMSUNG ELECTRONICS CO LTD